diff --git a/packages/grep/gnulib.patch b/packages/grep/gnulib.patch
index 562d2a071..72158666d 100644
--- a/packages/grep/gnulib.patch
+++ b/packages/grep/gnulib.patch
@@ -18,10 +18,10 @@ index a39102957..b3c7e6d28 100644
  	      -e 's|@''REPLACE_MBSINIT''@|$(REPLACE_MBSINIT)|g' \
  	      -e 's|@''REPLACE_MBRTOWC''@|$(REPLACE_MBRTOWC)|g' \
  	      -e 's|@''REPLACE_MBRLEN''@|$(REPLACE_MBRLEN)|g' \
-diff --git a/lib/strerror_r.c b/lib/strerror_r.c
+diff --git a/gnulib-tests/strerror_r.c b/gnulib-tests/strerror_r.c
 index f0244520b..90043c223 100644
---- a/lib/strerror_r.c
-+++ b/lib/strerror_r.c
+--- a/gnulib-tests/strerror_r.c
++++ b/gnulib-tests/strerror_r.c
 @@ -34,33 +34,26 @@
  
  #include "strerror-override.h"